Error detection in telegraph switching systems



April 4, 1961 R. sTEENEcK ETAL 2,978,541

ERROR DETECTION 1N TELRGRAPR swITcHING SYSTEMS 25 Sheets-Sheei'I 1 FiledSept. 25, 1959 April 4, 1961 R. sTEl-:NECK ETAL ERROR DETECTION INTELEGRAPH SWITCHING SYSTEMS 25 Sheets-Sheet 2 Filed Sept. 25, 1959 April4, 1961 R. sTEENl-:CK ETAL 2,978,541

ERROR DETECTION IN TELEGRAPH SWITCHING SYSTEMS Filed Sept. 25, 1959 25Sheets-Sheet 3 DISTRIBUTOR Y 1s* HALF oF sToP BUFFER STORAGE To F le. 7

1s* HALF oF OPERATE PULSE GENERATOR 2,978,541 ERROR DTECTION INTELEGRAPH SWITCHING SYSTEMS Filed sept. 25, 1959 y April 4, 1961 R.sTEENEcK ETAL 25 Sheets-Sheet 4 April 4, 1961 Filed Sept. 25. 1959 R.sTEENEcK ET AL 2,978,541

ERROR DETECTION 1N TELEGRAPH swITcHING SYSTEMS 25 Sheets-Sheet 5CHARACTER READING MATRIX FIG. 5

April 4, 1961 R. sTEENEcK ETAL ERROR DETECTION IN TELEGRAPH SWITCHINGSYSTEMS Filed Sept. 25, 1959 25 Sheets-Sheet 6 Fles., H, LTRS OUTPUT I79) Z8O oFF COMPUTER LIGHTS .Fmg .TN

R. STEENECK ETAL TO FIG.8

ERROR DETECTION IN TELEGRAPH SWITCHING SYSTEMS April 4, 1961 Filed sept.25, 1959 \N wma no a h n mma I mw wm vm NNN H M nw n F .w E238 E mm wwVI N3 W M will d I. 1 NQ w w #LVS mw N. Nm@ n.0; OF

April 4, 1961 R. sTEENEcK ETAL 2,978,541

ERROR DETECTION 1N TELEGRAPR swITcHING SYSTEMS Filed Sept. 25, 1959 25Sheets-Sheet 8 BINARY COUNTER April 4, 1961 R. sTEENEcK ETAL ERRORDETECTION Il-Ik TELEGRAPH SWITCHING' SYSTEMS Filed Sept. 25, 1959 25Sheets-Sheet 9 Nh HE n .GI o ww April 4, 1961 R. sTEENEcK ETAL ERRORDETECTION IN TELEGRAPH SWITCHING SYSTEMS 25 Sheets-Sheet 10 Filed Sept.25, 1959 Om )mv April 4, 1961 R. sTEENEcK ETAL ERROR imrEcflIoNIN'TELEGRAPH SWITCHING SYSTEMS Filed Sept. 25, 1959 25 Sheets-Sheet 11April 4, 1961 R. srEENEcK Erl-A1. 2,978,541

ERROR DETECTION IN TELEGRAPH SWITCHING SYSTEMS Filed Sept. 25, 1959 25Sheets-Sheet 12 To FIG. 13-

CORRECT VT VTIO April 4, 1961 R. sTEENEcK ETAL ERROR DETECTION INTELEGRAPH SWITCHING SYSTEMS Filed Sept. 25, 1959 25 Sheets-Sheet 15April 4, 1961 R. sTEl-:NECK ETAL ERROR DETECTION IN TELEGRAPH SWITCHINGSYSTEMS 25 Sheets-Sheet 14 Filed Sept. 25, 1959 NNN R. STEENECK ETALERROR DETECTION IN TELEGRAPH SWITCHING SYSTEMS Filed Sept. 25, 1959 25Sheets-Sheet 15 F5 .t5 Amv T0 FIG.

mwN

ma y# April 4, 1961 R. sTEl-:NECK :r1-AL 2,978,541

ERROR DETECTION IN TELEGRAPH SWITCHING SYSTEMS Filed Sept. 25, 1959 25Sheets-Sheet 1G CHARACTER READING MATRIX LTRS. F FIGS. QR.

-TO FIG. 20.

INITIAL STORAG` REPERF. READBACK PINS TO FIG. l5

April 4, 1961 R. sTEENEcK ETAL 2,978,541

ERROR DETECTION IN TELEGRAPH SWITCHING SYSTEMS Filed Sept. 25, 1959 25Sheets-Sheet 17 FIG. I7

ON READ-BACK REPERFORATOF? April 4, 1961 R. STEL-:NECK ET AL ERRORDETECTION IN TELEGRAPH SWITCHING SYSTEMS Filed Sept. 25, 1959 25Sheets-Sheet 18 April 4, 1961 R. sTEENEcK ETAL 2,978,541

ERROR DETECTION 1N TELEGRAPH swITcHING SYSTEMS 25 Sheets-Sheet 19 FiledSept. 25. 1959 April 4, 1961 R. sTEENEcK ETAL 2,978,541

ERROR DETECTION 1N TELEGRAPH swITcHING SYSTEMS 25 Sheets-Sheet 20 FiledSept. 25, 1959 .INN .GI 0..

